Refrigerating system



April 30, 1929. T. J. LITLE, JR 1,711,270

REFRIGERATING SYSTEM Filed Sept. 28, 1926 //7ue/7/0/. 77/0M/15 J L/TLE J5.

HTTOE/YEY Patented Apr. 30, 1929.

-- UNlTED 'ST-ATES PATENTOFFIVCE.

THOMAS J. LITLE, an, or DETROIT, mcnrenm'assmnon T COPELAND rnomrc'rs,

me, or DETROIT, MICHIGAN, A conronarioiv or urcnrem.

REFBIGEBATING SYSTEM.

Application-filed September 28, 1926. Serial 80. 188,814.

The objcct'of my invention is to 'provide means for impeding the flow of refrigerant from the high pressure side of the refrigerating system and at the same time provide for steady and continuous flow from the high to the low pressure side.

Another object of my invention is to provide a cheap and easily constructed means for reducing the pressure of refrigerant as In it flows from the high pressure to the low pressure side of the system by impeding the flow of the refrigerant.

With these and other objects inxview, my

, invention consists in the arrangement,'com- I bination and construction of the various parts of my improved device, as described in the specification, claimed inmy clamps and shown in the accompanying drawing, 1n which:

Fig. 1 is a plan view of my device partly 111 section.

Fig. 2 is a side partly in section.

Fig. 3 is a View taken on line 3-3 of Fig. 1.

Fig.4 is a plan view of a modificat on of 'mydevice partly in section.

Fig. 5 is a side elevation of a modification of my device partly in section.

Fig. 6 is a view taken on line 6 6 of Fig. 4.

I have shown in Figs. 1 and 2 a metal tube 1 having portions 2 thereof flattened in such a manner that the opposite walls of the tube 1 are ressed tightly together at the flattened portlons as at 3 except at the centers thereof as at 4, 5 and 6 where sufficient space elevation of my device is left between the flattened walls of the tube to permit refrigerant to flowthere-through, thus forming a series of chambers 7, 8 and 9 which are connected by the restricted passages 4, 5 and 6.

, In Figs. 4 and 5 I have shown a tube 20 having a portion 21 thereof flattened until there is a relatively narrow space left between the depressed walls thereof. The depressed walls of the tube are then squeezed tightly together at spaced intervals as at 22, leaving passages 23 between the depressed walls at each end and along the sides of each of the depressions 22 of sufficient size to permit the flow of refrigerant in a circuitous path through the depressed portion 21 of the tube 20. I

In operation refrigerant enters the portion 10 of the tube 1 under pressure, from the condenser of the refrigeratingmachine (not shown) and passes in r'educed volume.

through passage 4 into-chamber 7 where it expands somewhat and then continues in re 'duced volume through passage 5 into chamber 8 where it continues to expand and then in reduced volume through passage 6 into chamber 9 where it continuesto expand and passes onto the expansion chamber of the refrigerating machine (not shown) where the expansion is completed. Thus,'the impeded and reduced flow caused by therestricted passages 4, 5 and 6 and the successive expansion in chambers 7, 8 and 9 serves to reduce the pressure'under which the refrigerant passes from the condenser to the expanslon chamber, and therestricted passages 4, 5 and 6 hold back suflicient refrigerant to insure a steady flow in the desired amounts into the expansion chamber.

It is obvious that any desired number of the restricted passages 4, 5 and 6 and chambers 7, 8 and 9 may be provided.

In the modification shown-in Figs. 4, 5

and 6 the refrigerant enters the portion 24 of the tube 20 from the refrigerant condenser (not shown) and passes in reduced flow through the winding and restricted passa es 23 around the depressions 22 until it reac es the portion 25 of the tube 20 through which it passes to the refrigerant expansion chamber (not shown). The pressure on the refrigerant is thus reduced'as it passes through the restricted passages 23, and suificient is held back by the restricted passages to insure a steady flow at the desired rate into the expansion chamber.

Itwill be obvious that various changes may be made in the arrangement, combination and construction of the various parts of my improved device without departing from the spirit of my invention, and it is my intention to cover by my claims such changes as may be reasonably included within the scope thereof.

What I claim is:

1. In a mechanical refrigerating system, a pressure reducing device comprising a tube having a series of spaced indentations therein materially restricting the cross sectional area of said tube at spaced points, thereby forming a series of connected chambers therein having restricted inlet and outlet passages.

2. In a mechanical refrigerating system, a pressure reducing device comprising a tube having a series ofspaced transverse opposed indentations therein and having the indented walls of said tube compressed tightly to gether except at the center thereof, for providing restricted passages through said tube past each of said indentations.

3. In amechanical refrigerating system, a pressure reducing device comprismg a tube, a portion of the walls of which are deformed to materially reduce the cross sectional area thereof at such portion.

4. In a mechanical refrigerating system, apressure reducing device comprising a tube, portions of the opposed walls of said tube being deformed into contact with each other whereby to materially restrict the cross sectional area of said tube at such portions.

5. A pressure reducing device for a mechanical refrigerating system comprisin a tube, opposite side walls of which are iametrically crushed together except for a limited space providing a restricted passage throu hsaid tube. 4

6. pressure reducing device for mechanical refrigerating systems comprising a tube having its opposite walls deformed at spaced points into contact with each other THOMAS J. LITLE, JR. 

